Guide pad

Abstract

A guide gib ( 500 ) for a deep drilling tool of a substantially rectangular shape with a longitudinal direction (L) and a width (B) and with at least one sliding surface ( 540 ) is characterized in that at least one lubricating groove, preferably a plurality of lubricating grooves ( 501, 502 ), is/are arranged at least in the region of a contact zone of the sliding surface.

The invention claimed is: 
     
       1. A guide pad for a deep drilling tool, the guide pad having
 a length, 
 a width smaller than the length, 
 a height smaller than the length and smaller than the width, and 
 at least one sliding surface across the length and the width and at a top of the height, 
 wherein a first area of a contact zone of the at least one sliding surface consists of an area along a front sixth of the length of the guide pad and along the width starting inwards from opposite width edge regions of the at least one sliding surface, 
 wherein a plurality of lubricating grooves are arranged in the first area of the contact zone of the at least one sliding surface; and 
 wherein the lubricating grooves are implemented as closed pockets arranged in the at least one sliding surface of the guide pad, a first pocket and a second pocket of the closed pockets being disposed completely within the first area of the contact zone. 
 
     
     
       2. The guide pad according to  claim 1 , wherein the lubricating grooves have a length which approximately corresponds to their width.